// Copyright 2019 Google, Inc.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
  optional chain on member expression in async context
info: |
  Left-Hand-Side Expressions
    OptionalExpression
      MemberExpression [PrimaryExpression identifier] OptionalChain
features: [optional-chaining]
flags: [async]
---*/

function Test() {
    const a = undefined;
    const c = {d: Promise.resolve(11)};
    async function checkAssertions() {
      assert.sameValue(await a?.b, undefined);
      assert.sameValue(await c?.d, 11);
  
      Promise.prototype.x = 42;
      var res = await Promise.resolve(undefined)?.x;
      assert.sameValue(res, 42, 'await unwraps the evaluation of the whole optional chaining expression #1');

      Promise.prototype.y = 43;
      var res = await Promise.reject(undefined)?.y;
      assert.sameValue(res, 43, 'await unwraps the evaluation of the whole optional chaining expression #2');
  
      c.e = Promise.resolve(39);
      assert.sameValue(await c?.e, 39, 'await unwraps the promise given after the evaluation of the OCE');
    }
    checkAssertions().then($DONE, $DONE);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
